Massive climber rose in Container. Doable?
Hello! I asked this question on the rose forum as well, but I suspect the folks here at the container gardening forum would be able to provide me with some insight as well.
I want to grow a climbing rose to climb from a container on my porch up a trellis and onto an adjoining balcony above my garage. The rose in consideration is "New Dawn", which is reputed to grow 20 feet tall, and is hardy to zones 5a - 9b, and I live in zone 5b/6a.
Here are my concerns:
1) How large a container do I need to plant this massive rose, to allow it to grow to full mature size in however many years it takes? I understand that an undersized pot will cause stunted growth as the root system growth will be restricted.
2) What kind of winter protection will I need to provide the rose? (I will not be able to move the container once it is in place)
3) What kind of soil/potting mix should I use for my rose?
4) Could anyone recommend a good fertilizer regime? Roses are heavy feeders.
I would appreciate all suggestions! My rose will be getting full sun in the position it will be in.